Fluid

Fluid (formerly Instadapp) combines lending, vaults and DEX liquidity through a shared liquidity layer, so the same capital can support lending and trading. Fluid is a unified liquidity protocol built by the Instadapp team, in which a single Liquidity Layer sits underneath a lending market, vaults and a native DEX, so the same dollar of deposits backs multiple functions at once (Instadapp blog, Fluid introduction, 10 Oct 2023). Its two signature primitives are Smart Collateral, where collateral is simultaneously deployed as DEX liquidity earning trading fees, and Smart Debt, where the borrowed position itself acts as DEX liquidity so trading fees offset borrowing cost (Instadapp blog, Fluid DEX, 19 Jun 2024). The Liquidity Layer is deliberately minimal, a contract that stores assets and validates supply, borrow, repay and withdraw with automated per block debt and collateral ceilings, while rate logic and risk management live in modules on top (OAK Research, Fluid). That architecture supports LTVs up to 95% with liquidation penalties as low as 0.1% via a tick based liquidation engine where traders act as liquidators (Instadapp blog, Fluid introduction). The Instadapp governance token INST was renamed FLUID at a 1:1 ratio in December 2024, keeping the same token address and 100M supply (Rebranding and Growth Plan for Fluid Protocol).

Capital efficiency: a shared liquidity layer lets collateral, debt, lending liquidity and trading liquidity work together, making it more efficient but more complex.

- Liquidity Layer: The core contract at the center of Fluid that custodies all protocol funds. It only interacts with the protocols built on top of it (not end users), consolidating liquidity from every module so newer protocols can automatically tap shared liquidity. It manages automated debt/supply limits, utilization rates, and pluggable interest-rate models. - Vaults (Smart Collateral & Smart Debt): Fluid's lending/borrowing protocol. Users supply collateral and borrow against it. The DEX integration introduces Smart Collateral (collateral doubles as AMM liquidity, earning lending interest plus trading fees) and Smart Debt (borrowed debt is deployed as trading liquidity, earning fees that offset borrow APR), pushing capital efficiency well beyond siloed lenders like Aave. - Fluid DEX: An AMM built directly on the Liquidity Layer, launched October 2024. It powers Smart Collateral and Smart Debt by turning lending/borrowing positions into productive trading liquidity. Within ~3 months it became the second-largest DEX on Ethereum by volume, and was the fastest DEX to surpass $10B cumulative volume on Ethereum (100 days). - FLUID token: The protocol's ERC-20 governance token on Ethereum (max supply 100M). Formerly INST; rebranded to FLUID in December 2024 via a 1:1 conversion on the same contract with no holder action required. Holders govern fee structures, integration priorities, and risk parameters through the Fluid DAO.

- Fluid (FLUID): Token, Governance token (ex-INST) - fUSDC, fETH (fTokens) (fUSDC): Receipt, Lending Receipt Token

- Smart Contract: Fluid concentrates all funds in a single shared Liquidity Layer contract, so a bug there would be systemic across lending, vaults, and DEX. Auditors (MixBytes) noted the code is optimized for maximum gas efficiency at the expense of clarity, which complicates review and raises the risk of subtle undiscovered bugs. - Oracle: Vault liquidations depend on price oracles to value collateral and debt. Manipulated or stale oracle prices could trigger unfair liquidations or allow under-collateralized borrowing, a risk amplified because Smart Collateral/Smart Debt positions are also live AMM liquidity. - Systemic: The unified design means DEX, lending, and borrowing share the same liquidity pool. A sharp DEX volume/price shock or a mass withdrawal can simultaneously stress collateral valuation, borrow availability, and liquidation capacity across all modules rather than being isolated to one product. - Collateral: Because collateral and debt double as trading liquidity, positions are exposed to impermanent-loss-style rebalancing and volatile-asset price swings on top of normal borrow risk, which can accelerate a position toward its liquidation threshold. - Governance: FLUID holders control fee structures, integration priorities, risk parameters, and treasury actions (e.g., the DAO transferred 12M FLUID to the Labs team wallet in Dec 2024). Concentrated voting power or a malicious/erroneous parameter change could adversely affect users.

- Underwriting: similar in that Asset by asset supply and borrow ceilings that adjust automatically at each block, acting as native circuit breakers; differs in that Dynamic single name and sector exposure limits set by a bank's risk function - Collateral: similar in that Smart Collateral: the same collateral simultaneously serves as DEX liquidity and earns trading fees; differs in that Rehypothecated collateral put to work in the securities lending book - Settlement: similar in that Onchain and atomic, with traders acting as liquidators through a tick based engine; differs in that Central counterparty default auction where clearing members bid on the defaulted book - Rate setting: similar in that Rates live in modules above the Liquidity Layer, not in the base contract; protocol fees are set by governance vote; differs in that Treasury sets funds transfer pricing above a minimal balance sheet ledger - Recourse on default: similar in that Non recourse; up to 95% LTV with liquidation penalties as low as 0.1% means very tight buffers before the protocol is exposed; differs in that Margin lending at a haircut, with the broker absorbing gap risk - Regulation: similar in that Interop Labs Ltd. in the BVI, with a published MiCA whitepaper containing explicit disclaimers of insurance and deposit guarantees; differs in that A bank operates under deposit insurance and prudential capital rules; Fluid explicitly has neither